यदि एक वृत्त की परिधि 33 सेमी है, तो इसका क्षेत्रफल कितना है?

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Bihar STET Paper I: Mathematics (Held In 2019 - Shift 1)
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  1.  सेमी2
  2. 42 सेमी2
  3.  सेमी2
  4.  सेमी2

Answer (Detailed Solution Below)

Option 3 :  सेमी2
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Bihar STET Paper 1 Social Science Full Test 1
150 Qs. 150 Marks 150 Mins

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दिया गया है:

वृत्त की परिधि = 33 सेमी

प्रयुक्त अवधारणा:

वृत्त की परिधि = 2πr,

जहाँ "r" वृत्त की त्रिज्या है।

एक वृत्त का क्षेत्रफल = πr2

गणना:

C = 2πr

⇒ 33 = 2πr

⇒ r = 

⇒ क्षेत्रफल = π × 

क्षेत्रफल = 

∴ वृत्त का क्षेत्रफल  सेमीहै

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